It's unclear if this unit comes with a bulb. It doesn't have a power plug or a C-clamp. This ETC Source Four Jr ellipsoidal light offers a 50-degree beam and 575-watt power for quality lighting.

To use this ETC Source Four Jr ellipsoidal light, first you need to connect it to a proper power source as it doesn't have a power plug. If you have a bulb, install it in the unit. When positioning it, you can adjust the 50-degree beam according to your lighting needs. Since it doesn't come with a C - clamp, you'll need to find another way to secure it. As for maintenance, keep it clean and dry. Check the bulb regularly and replace it if it burns out. Also, be careful when handling it to avoid any damage.